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RTOS Issues

Andrew Butler
Expert 2520 points
Other Parts Discussed in Thread: SYSBIOS

I am running the RTOS kernel on a F28069 launchpad and my code runs fine for about 2.5hrs. The typical thread profile is as shown below.

However, as soon as I hit that 2.5hr mark, the system goes into an infinite loop and I believe its is because of the following thread profile.

I have copied and pasted the some of the data from the Execution Anaylsis profile below.

------------------------------ No Error-----------------------------

,8836993150611,,C28xx,"LM_post: swi: 0xd122, func: 0x3da993, pri: 15",Post,SWI,ti_sysbios_knl_Clock_workFunc__E(),,826,SYSBIOS System Logger,_ti.uia.events.UIASWICtx,ti.sysbios.knl.Swi,,,795329383555,0xD122,0x3DA993,0xF,0x0,,,,,

------------------------------ Error-----------------------------

,8837003164700,,C28xx,"LM_post: sem: 0xd600, count: 0",Semaphore_LM_post,Unknown,,,837,SYSBIOS System Logger,ti.sysbios.knl.Semaphore,ti.sysbios.knl.Semaphore,,,795330284823,0xD600,0x0,,,,,,,


,8837003171511,,C28xx,"LM_post: sem: 0xd646, count: 168",Semaphore_LM_post,Unknown,,,838,SYSBIOS System Logger,ti.sysbios.knl.Semaphore,ti.sysbios.knl.Semaphore,,,795330285436,0xD646,0xA8,,,,,,,


,8837003177655,,C28xx,"LM_post: sem: 0xd63c, count: 0",Semaphore_LM_post,Unknown,,,839,SYSBIOS System Logger,ti.sysbios.knl.Semaphore,ti.sysbios.knl.Semaphore,,,795330285989,0xD63C,0x0,,,,,,,

I have no idea where those 3 semaphores come from because they are not there for 2.5hrs.

  • 0
    TI__Guru* 92250 points
    Hi Andrew,

    I have moved your question to the TI-RTOS forum for the experts here to comment. The link to the post will still work.

    Regards
    Lori
  • 0
    TI__Mastermind 21645 points
    Hi Andrew,

    Can you describe your application ? Also, when you see your application goes into an infinite loop, do you mean that it starts running the Idle function and never runs a task again ? Can you look at the ROV view for Task module and check what is the status of all the tasks ?

    From the log you shared it looks like one of the semaphore has a count of 168 which seems bad. It implies some thread is posting the semaphore repeatedly and it is not being consumed (or pended) fast enough. You can probably look at the Semaphore detailed view in ROV. It should provide some more info about the semaphores like their name and if any thread is pending on them.

    Best,
    Ashish
  • 0 in reply to Ashish Kapania
    Expert 2520 points
    I am just now seeing your post and since you mention the 168 posts and no pends, I believe I know what is happening. However, I set that semaphore up as binary and not counting so does that not fix the issue?
  • 0 in reply to Andrew Butler
    TI__Mastermind 21645 points
    Hi Andrew,

    Configuring the semaphore as a binary semaphore should limit the semaphore count to 1. Can you look at the Semaphore module's ROV view and check what the semaphore mode and count fields say ?

    Best,
    Ashish